Digging tool



FIG. 1 is a front elevational view of a digging tool, showing my new design,

FIG. 2 is a side elevational view thereof.

FIG. 3 is an enlarged fragmentary perspective view of the lower front portion thereof, and

FIG. 4 is an enlarged fragmentary rear elevational view thereof. 

The ornamental design for a digging tool, substantially as shown. 